Cellulose ethers and process of making



Patented Oct. 7, 1930 UNITED STATES MAX HABTMAINN, 01 311131311, NEAR BASEL, SWITZERLAND, ASSIGNOR TO THE 1mm PATENT OFFICE OF SOCIETY OI! CHEMICAL INDUSTRY IN BASLE, O1 ISABEL, SWITZERLAND cnLLnLosE nrnnns AND raoonss or mum No Drawing. Application filed August 8, 1929, Serial No. 854,522, and in Switzerland August 31, 1888.

.ing such halogen-alkylamines which contain a halogen atom capa le of being exchanged 3 to react with such compoundsof cellulose which are capable of reaction with comounds containing halogen atoms capable of ing exchanged. These cellulose derivatives are obtained by treating cellulosic material containing free hydroxyl groups, such as cotton, wood pulp, artificial silk, such as viscose silk or cuprammonium silk, acetate silk or othen ethers or esters of cellulose compounds containing free hydroxyl grou s, with alkali or earth alkali compounds. here are thus obtained basic esters of cellulose. As haloen'-alkylamines there may be used these odies themselves, such as chloroethylamine, chloropropylamine, and the like, or their alkyl or aryl or aralkyl substitution products, such as chloroet-hyldiethylamine, chloroethylethylaniline, or the like. The halogen derivatives from tertiary amines are particularly valuable roducts. Instead of the free bases, theirhy rochlorides or other salts may be used, particularly in presence of an excess of alkali in the alkali cellulose.

The halogen alkylamines or their salts may be used in aqueous solution, in which case care must be taken that-there is a thorough intermixture'of the alkali cellulose with the base; or the halogen alkylamines or their salts may be caused to react iii-presence of a suitable solvent, such as acetone. It is also possible to allow the halogen alkylamines to'react in a colloidal solution which consists for examplein introducing same into a soap solution or into another solution containing, a dispersing agent, such as albumin-solutions, glue, sulfite cellulose waste 1i uor or the quaternary am monium bases 0 mono-acylated diamines.

The reaction may occur at ordinary tempera-- tur'e or with application of heat. It is not necessary to start with cellulose alkali compounds which are obtainable from cellulose and concentrated alkalis, but the reaction may be carried out in very dilute alkalisor even in alkaline earths, particularly in the case of such sorts of cellulose which are easily swelled up in weak alkaline solutions, such as viscosesilk and cuprammonium silk. Moreover, cellulose estersewhich still possess free OH-groups may also be converted into basic cllulose derivatives by choosing the quanti ties of alkalis in such a way that a separation of acyl-groups does vnot occur or on] to a small extent; for example acetate silk t reads which contain, as is well known, free hydroxyl groups, can be converted, with reservation of their lustre, by means of ch oroethyldiethylamine into basic acetyl cellulose, if the process is performed at ordinar temperature in presence of milk of lime. 4 act- 1ngcomponents may be used in various proportions. Into 1 mol. of (RE O, 1 to 3 mols.

. of the chloramine ester may be introduced, sov

that for instance, one hydroxyloup of the cellulose corres onds, with 1 mo of chloroalkylamine. owever, it is possible to go below the molecular ratio 1: 1. By the action of a little chloroalkylarnine there is obtained a basic cellulose, derivative which has little 7 tendency to swell, whereas by a'stronger reaction products are obtained which swell more easily. The basic cellulose-ethers show,

as compared with cellulose, an essential va-' ethyldiethylaminehydrochloride s' lution and,- after drying, printed with a strongly alkaline thickemng agent. Where the action of the alkali occurs, the basic other is produced and in dyeing later with an acid dyestufi, for example with tartrazine, these places are strongly dyed. The process can alsobe applied while the fiber is sub 'ected tostretchin'g.

The new basic ethers of ce lulose are also-use ful as arentma'terial for further cellulose der1vat1ves. I For-instance, the .can be. further alkylated with, for exam e ride or they may be acylate ior instance a ethyl chlowith acetic anhydride, acetyl chloride, *toluene sulfochloride or the like in presence or'absenceof a diluent and a catalyst, the free hy-.

ing un erstood that this designation com- 4 PIISBS not only the formation of so-called etheroxides but also of ether salts (esters).

The products thus obtained may be used for A Viscose silk is introduced into caustic soda making artificial threads.

The products of theinvention may be dis-= solved in the known solvents for cellulose,

such. as ammoniacal copper oxide; or'they may be dissolved in the form of xanthate and from such solutions they can be regenerated b known methods in the form of films or ii ers. For example. in a solution of diethylaminoethyl-cellulose in Schweizers rea out there is obtained by precipitation with dilute sulfuric acid a basic cellulose which is quickly and intensely dyed by means of an acid dyestud, such as an acid red dvestufi. The products of the invention can also be used as additions in the manufacture of artificial,

threads from cellulose by dissolving them, together with ordinary cellulose, in the usual solvents for converting them into derivatives of cellulose in intermixture with ordinary cellulose, the products being suitable in making artificial threads.

The following examples illustrate the invention, theparts being by weight Example 1 16 parts of cotton in the form of yarn are immersed in 160 parts of caustic soda solution of 18 per cent strength. After 3 hours, the goods are centrifuged to se arate the excess of alkali solution and intro uced into a solu= tion of? parts of chloroethyldiethylamine in acetone, in which they are frequently handled for 3 hours; they are then washed with water gnddtinally with dilute acetic acid, and then Ea'm nple Q 16 parts of cotton yarn are mercerized under tension by means of caustic soda solution of 18 per cent strength. After the excess of solution has been separated the goods are the alkalinereaction disappears. The mer cerizedcotton thus obtained is dyed by means of aciddyestufi's, such as tartrazine, very in tensely and quickly.

Example 3 (lotton fabric is impregnated with a solution of chloroethyldiethylamine-hydrochloride of 5 per cent strength. After drying, the fabric is printed with a thickening containing 20 er cent of caustic soda solution. After the fa ric has been left at the ordinary temperature for 12 hours it is washed and dyed with a redacid dyestuff... The printed places are colored intensely dark red.

Ewample 4 solution of 20 per cent strength and then treated further as described in Example 1. I

Ewdmple 5 15 partsof loose cotton are caused to swellv goods are kept in movemenhwhereupon the goods are washed with water'u'ntil the alkaline reaction has disappeared.

Example 6 15 parts of loose cot-ton are converted into soda cellulose and, after pressing, subjected to the action of 18 parts of chloroethyldiethylamine-hydrochloride. By the excess of alkali the organic base is liberated, the goods are kneaded for 8 hours and then washed.

The diethylamino-ethyl-cellulose thus obtained may be used as such, or may be con verted into further cellulose derivatives.

Ewample 7 15 parts ofwood pulp are impregnated for 5 hours with caustic soda solution of 30 per cent strength. After thorough pressing, a solution of 30 parts. of chloroethyldiethylamine in acetone is added andthe whole is heated for 5 hours at 60 C. There is obt ained a mass capable of swelling.

Ewample 8 10 parts of the diethylamino-ethyl cellulose obtained as describedin Example 6 are dissolved in Schweizers reagent and precipitated in known manner.

Example 9- v 10 parts of the goods treated as described .in Example 6 are dissolved by treatment with caustic soda solution and carbon bisulfide and further worked in known manner.

Example 10 1 part of diethylaminoethyl-cellulose is heated with 2 parts of glacial acetic acid and 4 parts of acetic anhydride in the presence of zinc chloride until the fibrous material has passed into solution. -The acetyl product is precipitated by addition of water and further worked up by a known method.

Example 11 lOparts of cellulose and 3 parts of diethylaminoethyl-cellnlose are dissolved in Schweizers reagent and the solution thus obtained is spun by a known method.

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E'wwmple 12 A bath is prepared containin 1 part of chloroethyldiethylamine dissolve in 10 parts of water, 2 parts of a solution of the quaternary methylsulfateof the mono-oleyldi'ethylethylenediamine of 10 per cent strength, and

.40 parts of milk of lime of 5 percent strength,

whereupon parts of reeled. acetate silk are allowed to rotate in this solution for 1 hour at ordinary temperature. The goods are then washed with dilute acetic acid and rinsed with water. The acetate silk thus treated has its lustre preserved and is quickly and in ,tensely dyed with acid dyestuffs.

Example 13 10 parts of cotton yarn a're impre mated,

with a solution containing 1 part 0 a chloroethyldiethylamine, 2 parts of soda soap and 0.5 part of caustic soda in parts of j water, and are then hung into streaming steam for 10 minutes. Thereupon the goods are rinsed with dilute acetic acid and water.

Example 14 A solution containing 1 part of chloroethylpiperidino-chlorohydrate in 10 parts of water is mixed with 20 parts of acetone by causing and 5 parts of caustic soda solution of 10 per cent strength and the .whole is made up to form a solution of 50 parts by volume. In

this solution. 10 parts of reeled viscose silk are allowed to rotate and are then rinsed with water afterl hour.

4 Ewantple'id Yarn obtained by the treatment described in- Example 1 is dyed, as is usual for W001,

with an acid dyestufi with additionof acetic acid or sulfuric acid. According to the "choice-of dyestufl' various tints are obtained, which are characterized by. their vividness,

and productivity;

Example 16 Yarn treated as described in Exam le 1 is dyed, asis usual for cotton with a irect dyeing dyestufi, in a neutral bathi' According to the choice of the material, various tints are obtained which in general are-moredn- I 2. A manufacture of cellulose derivatives mono-haloby causing an aliphatic tertiary gen-alkylamine to react with al ali cellulose. 3. A manufacture of cellulose derivatives by causing chloro-ethyldiethylamine to react with alkali cellulose.

4. As new cellulose derivatives the new products which are obtained by causing an aliphatic mono-halogen-alkylamine to react with alkali cellulose, which products, in contradistinction to cellulose, contain nitrogen and show a pronounced basic'character and canbe dyed-with acid and substantive dyestuffs. I

5. As new cellulose derivatives the new products which are obtained by causing an aliphatic tertiary mono-halogen-alkylamine to react with alkali cellulose, whichproducts,

in contradistinction to cellulose, contain nitrogen and show a pronounced basic character and can be dyed with acid and sub stantive dyestuffs, 6. As new cellulose derivatives the new products which are obtained by causing chloroethyldiethylamine to react with alkali fabrics containing the products of claim 6.

In witness whereof I have hereunto signed my name this 26thda of Jul 1929.

, a H RTMANK' tense than'those which are obtainable under like conditions oncotton Cotton fabric treated in' accordancewith the present nvention is rinted in known manner withv an acid or irect d eing'dy'estufi. In both cases the fibre is yed at the printed places, whereas on ordinary cotton only those places are dyed which have been printed wit the direct dyestuffs.

What I claim is 1. A manufacture of cellulose derivatives an aliphatic mono-halogen-alkylamine to react with alkali cellulose. v 

